Frittatas are one of my all-time favorite breakfasts. Making these is so much faster than making omelets since you can mix everything together and just throw it in the oven. I don't add cheese to my frittatas because I find them fluffier without, but you can if you wish. I'm calling this one a "Denver" frittata, but replacing the usual ham with prosciutto because I believe prosciutto makes everything better!